2: Superconducting NMR magnets

[weezilla]

Could holding magnets or metals close to the NMR interfere with the magnet/shorten its life?

[nightrain766]

I hope the janitor doesn't have a pace maker "0

[paulalexanderbell]

what does it do to a brain

[weezilla]

@paulalexanderbell The brain doesn't work by typical electric current, but rather chemical potential currents. There are no documented effects of strong magnetic fields on cells/people. People who have worked around these magnets their whole lives never seem to have any increased health problems.

[Spirality0]

So much better that that one with the albino turds

[junior1984able]

11 volts per second, per metre squared does that?

[junior1984able]

cooloooosss!!

[FrozenHaxor2]

Weird, camera wasnt affected :P

[wbeaty]

@FrozenHaxor2 actually large effect. If the camera was a foot closer it screws up the mechanical focus and confuses the processor. Must remove battery each time that happened. Probably no effect on a camera w/no moving parts.

[AKAtheA]

@wbeaty moving in such brutal magnetic fields must induce current in the traces of the PCB...quite sure even cameras without moving parts wouldn't be happy ;-)

[fenix144]

you remind me of my physics teacher in highschool. and you look like him ^^

[K0W0O0N0]

Holy... i need one of these :-]

[nukesvids]

thats so fudgeing AWESOME!

[Hesperimenta]

here's how to do magic tricks

ecco come fanno i trucchi di magia

[proximxr]

What would happen if you let one neodymium bead touch it? How hard would it be to pull off?

[JdAmAsTa]

@proximxr I too work with NMR spectrometers. Some of my friends used to toss paperclips at it, thats not a problem at all because the inner magnetic field is shielded by an outer one, but as soon as a paper clip finds its way inside (i.e. entering the upper opening) it will stick on the magnet so hard that you can't pull if off no more and you need to disassemble the whole apparatus and shut down the permanent magnet, which will cost you around 300000 to 500000 USD just to get the paperclip out.

[acmilanshevachels]

@oOoxelAoOo that would be 1H NMR

[pchapman905]

Nothing better than working in a university :D

[corvettekiller96]

my uncle is a chemistry major at yale hes told me about these huge magnets ive only seen pics till now......now i know why thought they were so cool!

[yurikgaara]

what means NMR?

[1LilyShell]

i love science...thanks for the invisible dog thing...that was cute =)

[vritomos]

"invisible dog" LOL!

[MenkoDany]

I second that, ROFL :D

[puckhound95]

The magnetic fields will only make things better! Magnets are awesome! Especially superconducting ones!!! Man, you really need to become a Youtube partner!!!

[AaronAlso]

Do you ever worry about the effects on you health being around such an intense magnetic field for long periods of time?

Does anyone that works there ever experience nausea, unexplained sense of fear or a sensation of being watched?

[wbeaty]

Nope.

AC magnetic fields are found to have numerous bio-effects, but constant DC fields do not.

[AaronAlso]

Oh! well, I didn't know that... thanks for clarifying.

[wbeaty]

Students say that if you stick your head below the tank, where the field is strongest, then shake it back and forth, weird things happen. I haven't tried it myself.

[bestSVMS]

@wbeaty

well but your legs werent shaking

[Jv977]

lol

[mrwideboy]

That a magnex scientific 500Mhz unsheilded magnet,

[wloloo]

what is it for?

[wbeaty]

It uses radio waves and lets you plot the unknown shape of single molecules.

[kawana87]

@wbeaty You could also use it to pick up metal things :)

[blahdob]

MAH NIPPLE PIERCINGS! ARGH!!

[kawana87]

@blahdob MY PRINCE ALBERT!!!!!!

[wbeaty]

@kawana87 stay away from vibrating fields around big AC welders.

[nateralph]

did the magnet affect the camera at all while you were there?

[wbeaty]

Yes, if I tilt the camera down, some metal part gets yanked partly across the lens, then the processor gets confused and shuts down. Have to remove batteries to reset it. And I can't take pictures of stuff on the floor unless I put the camera on the floor and shoot horizontal.

[Ununs3pt1um]

I just said that there is iron in the blood =) nothing else (quote: . I dont know if magnets affect it somehow, but there are iron ions in your blood. ")

[mo4life123]

I work with these all day...I never felt a magnetic force against any of the metal subtances in the room...pens, braclets, watches, and the one we have is pretty intense.

[wbeaty]

You'd need large ferro objects to feel it. Pliers in your pocket. Or swiss army knife.

[mo4life123]

I'll try it tomorrow! :D!! hehehe

[mo4life123]

yeaa, didnt work i had a thick iron little crowbar, didnt really do much or anything at all

[wbeaty]

Maybe your cryo magnets are the more recent, much more expensive type with active shielding? We only have one of those. That one doesn't move tools around.

The older ones are just a vertical solenoid, no shielding. They'll let steel tools stand on end whenever held a foot or two from the container surface. They can yank in a standard oscilloscope cart from several feet away. (We use nonmagnetic stainless carts here.)

[AtomicCactus]

I carry forceps in my lab coat pocket (for TLC), and I remember the NMR magnet tugging on it when I was loading in a sample. Spooked me out at first until I realised what was happening lol.

[wyntje83]

fail

[Ununs3pt1um]

Ehrm... there is iron in your blood... desoxyhaemoglobin the red pigment in your blood can bind the oxigen and get to oxygenhaemoglobin. Both have a Fe2+ core. I dont know if magnets affect it somehow, but there are iron ions in your blood.

[wbeaty]

> There is iron in your blood.

There is iron in red water from rusty pipes, and can magnets remove this red? Do magnets attract rust? Nope. Do magnets affect DISSOLVED iron? Nope.

Magnets affect water. Magnets attract oxygen! But these are weak effects. The huge magnetism of iron/nickel/cobalt is a weird quantum-mech. effect and it needs the atoms of the metal to be spaced very close together ...but not TOO close. Some metals do it. Iron-based ceramics (ferrite) can do it.

[Wiktus1990]

Sure theyre weak? And how about the water diamagnetic attribute? Think thats weak too? So now put those together.

[wbeaty]

> Sure theyre weak?

Um, ever try to pick up some rust using a magnet? Now compare it to the attraction of iron powder.

They're incredibly weak. Metallic Iron, cobalt, and nickel are ferromagnet materials, while dissolved iron in blood is not. A given magnet can lift a huge mass of metal iron, while the paramagnetic or diamagnetic force on water, or oxygen, dissolved iron, etc. is so small it usually goes unnoticed.

[boemeles]

"It's the invisible doog! Woooh"

lmao!

[mooseythejuiceman]

Always get a kick outta your videos!

[benedictblue]

its so dangerous if you stay close with such a high amount of conentrated magnetic field arouind u for a long time

[LiquidZ2k]

What happens if you do?

[wbeaty]

> What happens if you do?

You'll have odd sleep hours, no money, and slowly develop a funny haircut and habits of dress. Soon you'll be indistinguishable from the other grad students.

[benedictblue]

might affect ur clood cirulation too.. AND UR BRAIn... THATS why many people are against maglev trains

[LiquidZ2k]

Any articles on that, I would love to read them.

Thanks

[benedictblue]

Well i just finish researching before so i now, i can tell you off by heart not 100% sure... So the reason why it affects your blood circulation is becuase the red blood cell has a bit of magnetisim so thats why you see ONLY some strong magnets which sticks on your hand... well U FEEEL a VERY FAINT force...

[wbeaty]

> So the reason why it affects your blood circulation is becuase the red blood cell has a bit of magnetisim

Nope, rust isn't magnetic. Neither is the iron in your blood.

Rumor: if you stick your head in the strongest field of a really big cryo magnet, down underneath the tank, then shake your head back and forth, it makes you high from electric currents in your brain tissue.

[sk8cre8]

yessss get wasted on magnetism!!! woooo

[LiquidZ2k]

A new fad for the kiddies, attaching giant magnets to their heads. =p

[benedictblue]

then why is it when you stick your head in this body scanning thing you can see ur bones? Because Bones has calcium and your blood has soemthing to do with it

[LiquidZ2k]

I have that now already, maybe it will do the reverse?!

[pmgodfrey]

I curious, what is the squeak, squeak, squeak sound. I heard that today when I was in a room with and MRI machine.

[ffsallnamestaken]

Thats just some inner ear problems cause by the iron in your blood.

Nothing to worry about!

[wbeaty]

> I curious, what is the squeak, squeak, squeak sound.

A helium compressor, part of a refrigerated probe. Dunno why an MRI machine would have one. Maybe they recover helium gas? Liquid helium gets expensive, and some large users do recycle it.

[carl95125]

Hmmm...so that's why may credit cards don't work anymore :(

Carl

[kaylor87]

they proved on myth busters that credit cards can not get messed up from magnets

[wbeaty]

> credit cards can not get messed up from magnets

These 100,000-gauss research magnets kill credit cards frequently, but the field drops off fast outside of a few feet. There's tape lines on the floor to show the "hazard area."

Normal magnets (ceramic or alnico) are more like 500 gauss, and their field drops off fast outside a few cm. Too erase it, you'd have to put the magnet right against the magnetic stripe on the card..

[samamanjaro]

That's amazing, but it can't be good for your sperm count...

[sockpuppetsfromhell]

How much electrical equipment was destroyed when you turned that thing on?

[modmadmike2]

it wont affect any electronics that don't have Hard Drives or a CRT monitor (like my eeepc with 28gb of SSD space).

[wbeaty]

> affect any electronics that don't have Hard Drives or a CRT

Hard drives are fairly well shielded, but CRTs in the lab are always warped and w/purple blotches.

Then we all bought LCD flatscreens.

Somebody really needs to make a Windows desktop background that's... all warped, with purple blotches. Makes the NMR group feel at home.

[snownet]

you have too much fun :(

[sandcrab132]

NYEH! :DDDD

[knighttemplar6]

I think you can be used in a tank and stop the bullets

[sandcrab132]

knighttemplar, good idea but i dont think lead is ferromagnetic :(

[modmadmike2]

but it can heat the bullets if that will do any thing.

[pkhamidar2com]

lol,

nehya

[Vampiiire]

"NYEH!" LMAO.

[aeroscope]

If the magnet is that strong...isn't it dangerous coz it will suck out the iron in your blood like in Xmen 3

[AKickToTheNuts]

aeroscope....I am more concerned with the Iron PLATE in his HEAD!

[armondikov]

I've always wondered if that was even possible, although since I've worked close to a 700MHz machine and it didn't do much. Although prolonged working with them puts you at risk of heart murmurs as the fields interferre with the nodes in your heart there's generally not a risk with them (though I keep getting an image in my head of someone's piercing flying across the room).

[marj13yuki]

no it won't. i think iron in our blood is dissolved in liquid, and its presence in the body is minimal... in xmen3 however, iron in that guards body was somewhat 100%(v/v), in whatever the solution is...

[MindTrip888]

how good is that for your health to be in range of such a high magnetic field?

Like would the iron in your blood be effected for starters?

And would it magnetize things within range?

My grandfather told me of magnetic field mine detectors vehicles in WWII, with all the people who were in them on a daily basis eventually dying of blood cancers.

Then there is the Curies and their work with Radium and their resultant cancers.

I don't mean to rain on your parade, I love this stuff, but be careful.

[desinfector]

woof woof.

:-)

[scovegner]

you can make water part with normal neo magnets .. only very slightly though; just place a disk magnet in a cup of water and barely cover the magnet, reflect some light off it and you'll see it deflected lightly .. and they're only what - 1 tesla?

[Zwickel]

Ahahahha damn man this is so entertaining and helpful.

[tdk7086]

can your dog have puppies,i'll have one... LOL

[MagicHandedAlex]

What the heck was that sound at the end? :P

[mozkill]

i find it interesting that you can have computers so close to such a big magnet.

[modmadmike2]

as long as there is no HDD's or CRT displays its fine

[stperkin]

Real cool. But what is it for? Just for fun?

[OFCMProductions]

it's to protect us from terminators...

[nilyas]

Cool Video!

[54spiritedwill54]

hehe, nice. thats awesome

[rudylyon57]

That's neat! During the '77 to '80 period I worked at MIT's Francis Bitter Magnet Lab (as a coop student)and was fortunate to have been exposed to the wonders of magnets and Superconductivity. In fact we tested a 30T hybrid (conventional core & superconductive periphery)magnet that at one time was a world record for magnetic strenth! Your video brings back many fond memories. Thanks.

[hybridteory]

1- field strengt is not that dangerous, but feild variations are

2- a 7.4 MRI magnet (due to his size) would crush the camera and the metal in the room would be flying

3- I dont know about FDA, but 7.4T MRI are available in europe

4- Not every metal is ferro-magnetic even though most of them heat in the presence of a magnetic field of this strenght

5- After "Strat Up" they just need a really small amout of power because they are not perfectly superconductive

[cmalark]

Try this trick we figured out in our lab with our 400 MHz NMR. Take a flathead screw driver, and place the tip against the welds at the bottom of the dewar. The screw driver should orient itself at about a 45 degree angle relative to the floor. Tap the handle of the screw diver lightly, and you now have a pendulum that will oscillate for days!

[DrPersonman]

Hay i always thought that neodymium was pronounced (ne o dim e um) or is it actuoly pronounced the way you said it (ne o dy me um)

or can it be pronounced either way?????

[Truthiness231]

How many watts per hour does that thing burn through? ^.^

[wbeaty]

> How many watts per hour does that thing burn through? ^.^

None! It's high current at zero voltage, so zero watts. (Of course it took some energy to liquify the helium and the nitrogen, and to run the tanker trucks which deliver them.)

[Saskachewan]

Is it possible to observe superconductivity in higher temperatures? [e.g. room temperature] or it always require near 0K temperature?

[Saskachewan]

Is it possible to observe superconductivity in higher temperatures? [e.g. room temperature] or it always require near 0K temperature?

[splevvy]

For now, superconductivity doesn't occur at room temperature, only somewhat higher temperatures (using liquid nitrogen), ie. high temperature superconductivity has been discovered (reaches 0 resistance at about 77K)

[Vampiiire]

Saying superconductivity only occurs at somewhat higher temperatures is pretty misleading. I understand what you meant, but you make it sound as if room temperature is below 77k (−196 °C/−321 °F) (which would make my room pretty damn cold)

[ChrisMills90]

My research is actually concerned with isolating the exact mechanism by which materials become superconductors in hopes of predicting what material configurations might have even higher transition temperatures (the temperature at which a material becomes a superconductor). The results are promising, Transition temperatures of 138K plus have been recorded in Cuprates. Anything above 77k is considered a "high temperature" super conductor.

[wbeaty]

> 11.7 Tesla...thats ridiculous. 7 T MRIs aren't even approved by the government for imaging.

Look again, it's not an MRI. No imaging is involved.

It's a research NMR magnet, a medium-sized one. Our big powerful ones cause my camera to crash. I think they move part of the focus mechanism, which makes the computer go crazy.

[tapijtklopper]

It doesnt look so strong. Is the magnetic field concentrated at another specific point?

[tapijtklopper]

And superconducting only occurs at very low temperatures? Are you sure it wasnt just a huge coil. NMR isnt superconducting, i think.

[scatman34]

11.7 Tesla...thats ridiculous. 7 T MRIs aren't even approved by the government for imaging.

[TheGoldenWaffle]

lol, I liked that dog joke. lol

Great vid ^_^

[jgarceau1583]

Is there a way of making an electromagnet in the range of 6.0 T, without liquid helium? Could you recommend a source for a schematic?

[utnfra]

FANTASTIC

[Kafelboy]

...the invisible dog...

nice joke ;o)

[emanemanresuresu]

Is this a big coil? Or something else? I don't know what a NMR is.

[wbeaty]

It's a big coil. But it's superconducting, in liquid helium, so after they first pump in the ten amps or so, and turn off the tiny heater which keeps the shorting bar disconnected, it keeps running forever.

"NMR" is basically the same as MRI magnets in hospitals: proton-flip absorption lines of hydrogen in water or other materials, "Nuclear Magnetic Resonance" (NMR)

[cdzhcdzh]

I have heard that if you put some iron filings in a glass jar, you can get a 3D representation of the field lines if you hold the jar in the magnetic field... Can you try this?

[wbeaty]

> iron filings in a glass jar, you can get a 3D representation of the field lines...

Ah, you want the THREE-D FIELD-VIEWING CELL, amasci com/electrom/statbotl.html

You'll see fascinating patterns using small permanent magnets, but the big dewars just give boring parallel fields. And unfortunately the iron filaments small enough to remain suspended are small enough to not show up well in photos. In the mean time, see youtube com/watch?v=j3JsNwDrUyY

[peterbrodersen]

Was the camera affected in any way?

[wbeaty]

Oddly, no. It was an old Sony digital cam. But later, when I went back to get some footage of steel tools on the floor all standing on end, I couldn't do it. The mechanical shutter in the camera would close when I got close. I had to remove the camera batteries to get it to open again. Probably I should have walked to the other side so the camera would be held at a different angle wrt the field.

[blinkys]

isnt this strong magnetic field dangerous to humans or other life?

[Russoft]

how? An MRI is also a very strong magnetic field. Now, if you had a piece of metal implanted in you... I would think that would be a different story.

[wbeaty]

Thousands of grad students working next to them every day DON'T get sick. Also, note that the iron in human blood is similar to rust in that it's a non-magnetic iron compound, and not iron metal.

[smartrocker9000]

thats awesome

[Amooga]

:-)

[Calliber50]

Now vibrate that magnet just a little bit and watch the electronics in the room go haywire!

[futnat]

hehe, nice.

u guys ever work? ;)

[bitRAKE]

ha ha...thanks for sharing the fun.

[Russoft]

11 teslas?? So uhhh, just ship one up this way why don't you, haha.

[robstorms]

He's a WITCH !!!!